IL766B-1

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Optoisolators are electrical devices designed to provide a data connection between two circuits while isolating them from one another, typically to protect one side from extreme levels of voltage on the other. The IL766B-1 is a type of optoisolator known as a transistor-photovoltaic output, used to bridge high voltage circuits to determine the existence of a signal voltage without danger of damaging circuits due to its isolation characteristics.

Functionality and Design

The IL766B-1 is designed with Phototransistor output, and is triggered with a pulsed signal to the LED input. The transistor is illuminated with a pulse from the LED, which closes the normally-open transistor, giving an output signal. The circuit is designed to operate with a pulse current from the LED between 12mA and 30mA, with a maximum voltage of 5.6V.

It consists of a gallium arsenide infrared emitting diode (IRED) which is optically coupled to a NPN silicon phototransistor. A high-voltage resistant synthetic resin case protects the device, and copper traces are used to provide electrical connections. It is rated to have a certain optical power and a wavelength of peak emission, as well as a trigger current and dark current.

Working Principle

The IL766B-1 operates under the principle of optoelectronics, a branch of electronics-photonics which studies the interaction between the electromagnetic radiation, in the form of optical power, and electrical power. It uses the light emitted from the LED to trigger a response from the phototransistor, activating the transistor when the LED is illuminated with pulses of current. The transistor then passes on the signal to connected circuitry, creating a signal voltage to indicate the existence of the pulse.

Application Field

The IL766B-1 is typically found in electronic appliances and industrial equipment. It is used to create a data transmission link between a high voltage circuit and other circuits, while providing protection against damage caused by spikes or fluctuations in voltage. The device is useful for switching operations in communication, motor control, and other industrial and consumer technologies. It can be used, for example, in power supply systems, automation equipment, consumer electronics, and medical devices. In these devices, the IL766B-1 can be used to detect various signals to trigger an output from the phototransistor unit.

Conclusion

The IL766B-1 is a type of optoisolator designed with phototransistor output, and can provide a data transmission between two circuits while isolating them from one another. It uses the light emitted from the LED to trigger a response from the phototransistor, which then passes on the signal to connected circuitry, creating a signal voltage to indicate the existence of the pulse. The IL766B-1 is useful for switching operations in communication, motor control, and other industrial and consumer technologies.

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